I recently tried to create an Adobe Extension that uses host adapters. But after exporting the extension and installing it with the Adobe Extension Manager CS5 I got an error message during startup of InDesign that the host adapter is not a valid plugin. Is it possible that the Extension Manager 2.0 does not support InDesign CS5 with host adapters? Because the plugin without the host adapter works. Or do I need older host adapter plugins? If yes, where can I download them?

Can you try changing the paths to the host adapters to be absolute paths, and also add the individual folders (csadapters-1.0 and csadapters-2.0) to your project? The host adapters are located under $(ExtensionBuilder_installation)/com.adobe.cside.libsinstaller_xxxx/archive/.

Additionally, modify your mxi entries for InDesign host adapters to target version 7.5 - 7.9 (CS5.5) using csadapters-1.0 and version 8.0-8.9(CS6) using csadapters-2.0. Then download the CS5 ID adapter from the link below and add them to your project to target version 7.0 - 7.4.

thanks for the CS5 host adapters. Unfortunately I still get the following error message during startup of InDesign CS5:

Adobe InDesign cannot load the IDHOSTADAPTER.PLN plug-in. The IDHOSTADAPTER.PLN plug-in requires the 7.5 version of InDesign.

Please contact the vendor to get a compatible version of IDHOSTADAPTER.PLN.

I could not use absolute paths in the mxi file because they were always interpreted as relative paths. But I don't think this is the problem, because all host adpaters are packaged in the generated zxp file. It seems that the versions of the CS5 host adapter and InDesign CS5 still do not fit together.

It would be create if you could provide additional links to host adapters of different versions I could try?